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Neves JB, Warren H, Santiapillai J, Rode N, Cullen D, Pavlou M, Walkden M, Patki P, Barod R, Mumtaz F, Aitchison M, Bandula S, Pizzo E, Ranieri V, Williams N, Wildgoose W, Gurusamy K, Emberton M, Bex A, Tran MGB. Nephron Sparing Treatment (NEST) for Small Renal Masses: A Feasibility Cohort-embedded Randomised Controlled Trial Comparing Percutaneous Cryoablation and Robot-assisted Partial Nephrectomy. Eur Urol 2024; 85:333-336. [PMID: 37684178 DOI: 10.1016/j.eururo.2023.07.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 06/22/2023] [Accepted: 07/19/2023] [Indexed: 09/10/2023]
Abstract
There is a paucity of high-level evidence on small renal mass (SRM) management, as previous classical randomised controlled trials (RCTs) failed to meet accrual targets. Our objective was to assess the feasibility of recruitment to a cohort-embedded RCT comparing cryoablation (CRA) to robotic partial nephrectomy (RPN). A total of 200 participants were recruited to the cohort, of whom 50 were enrolled in the RCT. In the CRA intervention arm, 84% consented (95% confidence interval [CI] 64-95%) and 76% (95% CI 55-91%) received CRA; 100% (95% CI 86-100%) of the control arm underwent RPN. The retention rate was 90% (95% CI 79-96%) at 6 mo. In the RPN group 2/25 (8%) were converted intra-operative to radical nephrectomy. Postoperative complications (Clavien-Dindo grade 1-2) occurred in 12% of the CRA group and 29% of the RPN group. The median length of hospital stay was shorter for CRA (1 vs 2 d; p = 0.019). At 6 mo, the mean change in renal function was -5.0 ml/min/1.73 m2 after CRA and -5.8 ml/min/1.73 m2 after RPN. This study demonstrates the feasibility of a cohort-embedded RCT comparing CRA and RPN. These data can be used to inform multicentre trials on SRM management. PATIENT SUMMARY: We assessed whether patients with a small kidney tumour would consent to a trial comparing two different treatments: cryoablation (passing small needles through the skin to freeze the kidney tumour) and surgery to remove part of the kidney. We found that most patients agreed and a full trial would therefore be feasible.
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Affiliation(s)
- Joana B Neves
- Division of Surgery and Interventional Sciences, University College London, London, UK; Specialist Centre for Kidney Cancer, Royal Free Hospital, London, UK
| | - Hannah Warren
- Division of Surgery and Interventional Sciences, University College London, London, UK; Specialist Centre for Kidney Cancer, Royal Free Hospital, London, UK
| | - Joseph Santiapillai
- Division of Surgery and Interventional Sciences, University College London, London, UK; Specialist Centre for Kidney Cancer, Royal Free Hospital, London, UK
| | - Nicola Rode
- Specialist Centre for Kidney Cancer, Royal Free Hospital, London, UK
| | - David Cullen
- Specialist Centre for Kidney Cancer, Royal Free Hospital, London, UK
| | - Menelaos Pavlou
- Department of Statistical Science, University College London, London, UK
| | - Miles Walkden
- Specialist Centre for Kidney Cancer, Royal Free Hospital, London, UK; Department of Interventional Radiology, University College London Hospital, London, UK
| | - Prasad Patki
- Specialist Centre for Kidney Cancer, Royal Free Hospital, London, UK
| | - Ravi Barod
- Division of Surgery and Interventional Sciences, University College London, London, UK; Specialist Centre for Kidney Cancer, Royal Free Hospital, London, UK
| | - Faiz Mumtaz
- Division of Surgery and Interventional Sciences, University College London, London, UK; Specialist Centre for Kidney Cancer, Royal Free Hospital, London, UK
| | - Michael Aitchison
- Specialist Centre for Kidney Cancer, Royal Free Hospital, London, UK
| | - Steven Bandula
- Department of Interventional Radiology, University College London Hospital, London, UK
| | - Elena Pizzo
- Department of Allied Health Research, University College London, London, UK
| | - Veronica Ranieri
- Clinical Psychology, Tavistock and Portman Foundation Trust, London, UK
| | - Norman Williams
- Division of Surgery and Interventional Sciences, University College London, London, UK
| | | | - Kurinchi Gurusamy
- Division of Surgery and Interventional Sciences, University College London, London, UK
| | - Mark Emberton
- Division of Surgery and Interventional Sciences, University College London, London, UK; Department of Urology, University College London Hospital, London, UK
| | - Axel Bex
- Division of Surgery and Interventional Sciences, University College London, London, UK; Specialist Centre for Kidney Cancer, Royal Free Hospital, London, UK
| | - Maxine G B Tran
- Division of Surgery and Interventional Sciences, University College London, London, UK; Specialist Centre for Kidney Cancer, Royal Free Hospital, London, UK.
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